Micropower Omnipolar Hall Effect Switch
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The AH1897S is a high sensitivity micropower Omnipolar Hall effect switch IC with an internal pull up and pull down capability. Designed for portable and battery powered equipment such as cellular phones and portable PCs, the average supply current is only 4.3μA at 1.85V. To support portable equipment, the AH1897S can operate over the supply range of 1.6V to 3.6V and uses a hibernating clocking system to minimize the power consumption. To minimize PCB space, the AH1897S is available in a small low profile X1-DFN1216-4 (Type B) package.
The output is activated with either a North or South pole of sufficient magnetic field strength. When the magnetic flux density (B) is perpendicular to the package is larger than operate point (Bop), the output will be turned on (pulled low). The output is turned off when B becomes lower than the release point (Brp). The output will remain off when there is no magnetic field.
| Compliance(Only Automotive supports PPAP) | Standard |
|---|---|
| AEC Qualified | No |
| Type | Omnipolar |
| Outputs | Single |
| Output Type | Push-Pull |
| Active Output State (B > Bop) | Low |
| Inactive Output State (B < Brp) | High |
| Operating Voltage (V) | 1.6 to 3.6 |
| Average Supply Current (mA) | 0.0043 |
| Min Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) | 14 |
| Typ Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) | 30 |
| Max Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) | 40 |
| Min Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) | 10 |
| Typ Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) | 20 |
| Max Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) | 10 |
| Operating Ambient Temperature (°C) | -40 to 85 |
A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.
| PCN # | Issue Date | Implementation Date | Subject |
|---|---|---|---|
| PCN-2512 | 2021-04-16 | 2021-07-16 | Qualified Additional Assembly & Test (A/T) Site |
